Chinese Journal of Perinatal Medicine, Volume 16, Issue 7,2013, Pages 394-396, doi:10.3760/cma.j.issn.1007-9408.2013.07.004
Chinese Journal of Perinatal Medicine, Volume 16, Issue 7,2013, Pages 437-440, doi:10.3760/cma.j.issn.1007-9408.2013.07.012
Chinese Journal of Perinatal Medicine, Volume 16, Issue 7,2013, Pages 388-390, doi:10.3760/cma.j.issn.1007-9408.2013.07.002
Chinese Journal of Perinatal Medicine, Volume 16, Issue 7,2013, Pages 444-446, doi:10.3760/cma.j.issn.1007-9408.2013.07.014
Chinese Journal of Perinatal Medicine, Volume 16, Issue 7,2013, Pages 416-421, doi:10.3760/cma.j.issn.1007-9408.2013.07.009